Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c0bf04a1348e1e…

MALICIOUS

PDF

44.5 KB Created: 2020-10-31 06:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: de9d976697c24e95df4921e19670f33b SHA-1: db2271b6278373f9da7e80202a75f96cbaa5940a SHA-256: 56c0bf04a1348e1e029da3861a1fa8ac0dac8c05b0e6af1327813a5e8ac9a0ed
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector and a link farm. One prominent URL, 'https://ttraff.cc/123?keyword=courage+the+cowardly+dog+monster+list', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/123?keyword=courage+the+cowardly+dog+monster+list In PDF document text
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/2074507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f93512e9eab2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_5f994e617b21a.pdfIn PDF document text
    • https://jipepusubame.weebly.com/uploads/1/3/4/0/134040653/3323169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5f874b884d368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_5f8df859dec5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f95fd5034765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368503/normal_5f89a887e9384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410448/normal_5f9808b2e9e15.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a763201a-1b0f-404e-bca8-8859d716e333/42448320006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8037/5211/files/triangle_congruence_by_asa_and_aas_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4397/7888/files/disuzupusevidiwebegorix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e92c962-790d-4fd0-89c3-cf93f6c18426/55744592014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0506/4582/7734/files/canon_pixma_g2020_printer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2920/8495/files/36272767648.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7253/5707/files/in_search_of_sanity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5474/3200/files/free_online_grade_6_reading_comprehension_worksheets.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7C 5452 bytes
SHA-256: b157ee9979b543c39c4a4ca3a5d6a717c91a80626c21e013f9138e632e6e4a9f
font_01_sfnt_off00007dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEA 11960 bytes
SHA-256: b732f979e9ead9da0ce26d83650728c536a5c20da167a2289d0bd5a228c29ba9

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